string is owned by the #GDateTime and it should not be modified or freed
DateTime.getTimezoneAbbreviation
string getTimezoneAbbreviation()Determines the time zone abbreviation to be used at the time and in the time zone of datetime.
For example, in Toronto this is currently "EST" during the winter months and "EDT" during the summer months when daylight savings time is in effect.
Returns
the time zone abbreviation. The returned